I suppose the phrase "run after" refers to those who're chasing. Then, which expression can you use when someone is "being chased" by others?
Native speaker’s answer
Rebecca
Correct! To "run after" someone means to chase them! To refer to the person being chased, you can say that they were "chased down" or "pursued." If a person was successfully chased down, you can say that they were "caught up" with. Ex: A Good Samaritan chased me down to return my lost wallet. Ex: He caught up with me by taking a taxi.